CN111717257A

CN111717257A - Automatic engineering shallow of unloading

Info

Publication number: CN111717257A
Application number: CN202010647622.9A
Authority: CN
Inventors: 王田江
Original assignee: Fuzhou Libao Technology Co ltd
Current assignee: Fuzhou Libao Technology Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2020-09-29

Abstract

The invention discloses an automatic unloading engineering cart, which comprises a cart, wherein the front end and the rear end of the cart are both rotatably connected with an axle, the axle is fixedly connected with wheels, the wheels are provided with clamping grooves with openings facing the trolley, the left end of the trolley is fixedly connected with two push rods which are symmetrical front and back, a storage cavity with an upward opening for storing transported materials is arranged in the trolley, an outlet communicated with the outside and the storage cavity is arranged in the right inner wall of the storage cavity, the device has simple structure and convenient use, returns the automatic lifting baffle plate when in transportation, prevents materials from falling out of the cart when going up and down the slope, does not waste materials, and not only, the device can also automatic discharge, does not need the manual work to overturn the car hopper and topples over, saves physical power, raises the efficiency, can also be at the in-process fixed trolley position of unloading, prevents that the position of unloading is not accurate enough.

Description

Automatic engineering shallow of unloading

Technical Field

The invention relates to the field of engineering carts, in particular to an automatic unloading engineering cart.

Background

In the production process, in order to save physical strength and improve efficiency, the auxiliary of an engineering cart is often needed to carry and convey materials, but most of the existing carts are tipping small carts and flat carts, the loaded materials are limited, physical strength is excessively consumed, and the efficiency is low; in addition, the existing small cart cannot load too much materials, is easy to dump in the process of ascending and descending, increases the steps of subsequent cleaning and collection, reduces the conveying efficiency and wastes materials.

Disclosure of Invention

The invention aims to provide an automatic unloading engineering cart, which overcomes the problems of low unloading efficiency, waste in the conveying process and the like.

The invention is realized by the following technical scheme.

The invention relates to an automatic unloading engineering cart, which comprises a cart, wherein the front end and the rear end of the cart are rotatably connected with an axle, the axle is fixedly connected with wheels, the wheels are provided with clamping grooves with openings facing the cart, the left end of the cart is fixedly connected with two push rods which are symmetrical front and back, a storage cavity with an upward opening for storing transported materials is arranged in the cart, the right inner wall of the storage cavity is internally provided with an outlet communicated with the outside and the storage cavity, the cart is internally provided with an unloading mechanism for unloading materials, the unloading mechanism comprises a sliding cavity which is arranged in the lower inner wall of the storage cavity and communicated with the storage cavity, the lower inner wall of the sliding cavity is internally provided with a trapezoidal cavity with an upward opening, a trapezoidal block is connected in the trapezoidal cavity in a sliding manner, the lower end of the trapezoidal block is fixedly connected with a lifting spring, and the lower end, a reset cavity communicated with the sliding cavity is arranged in the left inner wall of the sliding cavity, a push plate is connected in the reset cavity in a sliding manner, the push plate is provided with a push groove with a rightward opening, a driving block is connected in the push groove in a sliding manner, a telescopic cavity with a rightward opening is arranged in the left inner wall of the reset cavity, a telescopic rod with a right end fixedly connected with the push plate is connected in the telescopic cavity in a sliding manner, a telescopic spring is fixedly connected at the upper end of the telescopic rod and fixedly connected with the upper inner wall of the telescopic cavity, a limit cavity with a rightward opening is arranged in the left inner wall of the telescopic cavity, a limit block is connected in the limit cavity in a sliding manner, a limit spring is fixedly connected at the left end of the limit block and fixedly connected with the left inner wall of the limit block, a push cavity with a downward opening is arranged in the upper inner, the improved pneumatic pipe type hydraulic lifting device is characterized in that the tension spring is fixedly connected with the upper inner wall of the pushing cavity, the upper inner wall of the pushing cavity is fixedly connected with a communicating portion, the pushing cavity and the pneumatic pipe of the ladder-shaped cavity are pushed, a switching mechanism used for transmission switching is arranged in the right inner wall of the resetting cavity, a leakage-proof mechanism used for preventing dumping is arranged below the switching mechanism, and an outlet brake mechanism used for controlling an outlet and braking is arranged in the push rod.

Further, the switching mechanism comprises a power cavity positioned in the right inner wall of the reset cavity, a motor is fixedly connected to the left inner wall of the power cavity, the motor is in power connection with a power shaft, a driving gear is in key connection with the power shaft, a ring groove is formed in the driving gear, rotating shafts are rotatably connected to the left inner wall and the right inner wall of the power cavity, a wire wheel and a driven gear are fixedly connected to the rotating shafts, an elastic rope is wound on the wire wheel on the left side, penetrates through the upper inner wall of the power cavity and the upper inner wall of the telescopic cavity and is fixedly connected with the upper end of the telescopic rod, a pull rope is wound on the wire wheel on the right side, penetrates through the upper inner wall of the power cavity and the rear inner wall of the sliding cavity and is fixedly connected with the right end of the driving block, the driven gear is engaged with the, the switching cavity is internally and slidably connected with a switching rod, the upper end of the switching rod is located in the annular groove, the right end of the switching rod is fixedly connected with a reset spring, the right end of the reset spring is fixedly connected with the right inner wall of the switching cavity, the left end of the switching rod is fixedly connected with a long line, and the long line penetrates through the left inner wall of the switching cavity and the left inner wall of the limiting cavity and the left end of the limiting block is fixedly connected with the limiting block.

Furthermore, the leakage-proof mechanism comprises an upward moving cavity which is positioned in the inner wall of the storage cavity and has an upward opening, two bilaterally symmetrical check blocks are connected in the upward moving cavity in a sliding manner, the lower ends of the check blocks are fixedly connected with an extension spring, the lower end of the extension spring is fixedly connected with the lower inner wall of the upward moving cavity, a gravity cavity is arranged in the lower inner wall of the power cavity, a round block is connected in the gravity cavity in a sliding manner, moving cavities with openings facing the gravity cavity are arranged in the left and right inner walls of the gravity cavity, a moving block is connected in the moving cavity in a sliding manner, one end of the moving block, far away from the round block, is fixedly connected with a moving spring, the other end of the moving spring is fixedly connected with the inner wall of the moving cavity, far away from the gravity cavity, a thin rope is fixedly connected to one end of the moving block, the thin rope on the left side penetrates through the, the string on the right side penetrates through the inner wall of one end, far away from the gravity cavity, of the moving cavity and the lower inner wall of the upper moving cavity and is fixedly connected with the lower end of the stop block on the right side.

Further, the outlet brake mechanism comprises a long rod cavity which is positioned in the hand push rod and has an opening facing the storage cavity, a long rod is connected in the long rod cavity in a sliding manner, a groove is arranged on the long rod, a positioning cavity communicated with the long rod cavity is arranged on the inner wall of the long rod cavity far away from one end of the storage cavity, a positioning block is connected in the positioning cavity in a sliding manner, one end of the positioning block far away from the storage cavity is fixedly connected with a positioning spring, the other end of the positioning spring is fixedly connected with the inner wall of the positioning cavity far away from the storage cavity, one end of the positioning block far away from the storage cavity is fixedly connected with a pull wire, the other end of the pull wire is fixedly connected with a pull ring, the rear side of the long rod is fixedly connected with a connecting spring, the left end of the, the right end of the pressure spring is fixedly connected with the right inner wall of the long rod cavity, a compression cavity with an upward opening is arranged in the lower inner wall of the outlet, a baffle is connected in the compression cavity in a sliding manner, a compression spring is fixedly connected at the lower end of the baffle, the lower end of the compression spring is fixedly connected with the lower inner wall of the compression cavity, a long rope is fixedly connected at the lower end of the baffle and penetrates through the lower inner wall of the compression cavity and the right inner wall of the long rod cavity behind the compression cavity to be fixedly connected with the right end of the long rod, snap cavities with openings facing the wheels are arranged in the front inner wall and the rear inner wall of the gravity cavity, a clamping block is connected in the snap cavities in a sliding manner, one end of the clamping block, which is far away from the wheels, is fixedly connected with an extension spring, the other end of the extension spring, the fine line penetrates through the inner wall of the fast clamping cavity and the front left inner wall of the long rod cavity and is fixedly connected with the left end of the long rod.

Furthermore, the elastic force of the pressure spring is greater than that of the extension spring, the elastic force of the extension spring is less than that of the movable spring, and the elastic force of the limit spring is greater than that of the return spring.

The invention has the beneficial effects that: the device simple structure, convenient to use returns automatic rising baffle when the transportation, prevents that the material from falling out the shallow when going up the downhill path, can not waste the material, moreover, the device can also automatic discharge, does not need the manual work to overturn the car hopper and topple over, saves physical power, raises the efficiency, can also be at the in-process fixed trolley position of unloading, prevents that the position of unloading is not accurate enough.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram at A-A in FIG. 1 according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram at C-C in FIG. 1 according to an embodiment of the present invention;

fig. 5 is an enlarged schematic view of the structure shown at D in fig. 2 according to an embodiment of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The automatic unloading engineering cart described in conjunction with fig. 1-5 comprises a cart 11, wherein the front end and the rear end of the cart 11 are rotatably connected with an axle 56, the axle 56 is fixedly connected with a wheel 55, the wheel 55 is provided with a clamping groove 57 with an opening facing the cart 11, the left end of the cart 11 is fixedly connected with two push rods 22 which are symmetrical front and back, the cart 11 is provided with a storage cavity 23 with an upward opening for storing transported materials, the right inner wall of the storage cavity 23 is provided with an outlet 24 which is communicated with the outside and the storage cavity 23, the cart 11 is provided with an unloading mechanism 72 for unloading materials, the unloading mechanism 72 comprises a sliding cavity 54 which is positioned in the lower inner wall of the storage cavity 23 and is communicated with the storage cavity 23, the lower inner wall of the sliding cavity 54 is provided with a trapezoidal cavity 28 with an upward opening, and the trapezoidal block 27 is slidably connected in the trapezoidal, the lower end of the trapezoidal block 27 is fixedly connected with a lifting spring 78, the lower end of the lifting spring 78 is fixedly connected with the lower inner wall of the trapezoidal cavity 28, a reset cavity 76 communicated with the sliding cavity 54 is arranged in the left inner wall of the sliding cavity 54, a push plate 16 is slidably connected in the reset cavity 76, the push plate 16 is provided with a push groove 17 with a right opening, a driving block 53 is slidably connected in the push groove 17, a telescopic cavity 13 with a right opening is arranged in the left inner wall of the reset cavity 76, a telescopic rod 12 with a right end fixedly connected with the push plate 16 is slidably connected in the telescopic cavity 13, the upper end of the telescopic rod 12 is fixedly connected with a telescopic spring 14, the telescopic spring 14 is fixedly connected with the upper inner wall of the telescopic cavity 13, a limit cavity 49 with a right opening is arranged in the left inner wall of the telescopic cavity 13, a limit block 48 is slidably connected in, limiting spring 50 with the left inner wall fixed connection of stopper 48, be equipped with the decurrent promotion chamber 52 of opening in the inner wall on the flexible chamber 13, sliding connection has catch bar 51 in the promotion chamber 52, catch bar 51 upper end fixedly connected with tension spring 77, tension spring 77 with inner wall fixed connection on the promotion chamber 52, inner wall fixedly connected with intercommunication on the promotion chamber 52 promote chamber 52 and the pneumatic tube 29 of trapezoidal chamber 28, be equipped with the switching mechanism 73 that is used for the transmission to switch in the chamber 76 right side inner wall that resets, switching mechanism 73 below is equipped with the leak protection mechanism 75 that is used for preventing empting, is equipped with the export brake mechanism 74 that is used for controlling export and brake in the handspike 22.

Beneficially, the switching mechanism 73 includes a power cavity 37 located in the right inner wall of the reset cavity 76, a motor 43 is fixedly connected to the left inner wall of the power cavity 37, the motor 43 is in power connection with a power shaft 42, the power shaft 42 is in key connection with a driving gear 79, an annular groove 47 is formed in the driving gear 79, a rotating shaft 44 is rotatably connected to each of the left and right inner walls of the power cavity 37, a reel 45 and a driven gear 46 are fixedly connected to the rotating shaft 44, an elastic rope 15 is wound on the reel 45 on the left side, the elastic rope 15 penetrates through the upper inner wall of the power cavity 37 and the upper inner wall of the telescopic cavity 13 and is fixedly connected to the upper end of the telescopic rod 12, a pull rope 26 is wound on the reel 45 on the right side, the pull rope 26 penetrates through the upper inner wall of the power cavity 37 and the rear inner wall of the sliding cavity 54 and is fixedly connected to the right end, be equipped with the ascending switching chamber 38 of opening in the inner wall under the power chamber 37, it is located to switch the switching pole 40 of intracavity 38 internal sliding connection upper end in the ring channel 47, switching pole 40 right-hand member fixedly connected with reset spring 41, reset spring 41 right-hand member with switch chamber 38 right side inner wall fixed connection, switching pole 40 left end fixedly connected with long line 39, long line 39 pierces through switch chamber 38 left side inner wall and spacing chamber 49 left side inner wall with stopper 48 left end fixed connection.

Beneficially, the anti-leakage mechanism 75 includes an upward moving cavity 18 located in the inner wall of the storage cavity 23 and having an upward opening, two bilaterally symmetrical stoppers 21 are slidably connected in the upward moving cavity 18, an extension spring 19 is fixedly connected to the lower end of each stopper 21, the lower end of the extension spring 19 is fixedly connected to the lower inner wall of the upward moving cavity 18, a gravity cavity 81 is arranged in the lower inner wall of the power cavity 37, a round block 36 is slidably connected in the gravity cavity 81, moving cavities 33 having openings facing the gravity cavity 81 are respectively arranged in the left and right inner walls of the gravity cavity 81, a moving block 35 is slidably connected in the moving cavity 33, one end of the moving block 35 away from the round block 36 is fixedly connected with a moving spring 34, the other end of the moving spring 34 is fixedly connected to the inner wall of the moving cavity 33 away from the gravity cavity 81, and one end of the moving block 35 away from the round block 36, the left side the string 20 penetrates the inner wall of the moving cavity 33 far away from one end of the gravity cavity 81 and the lower inner wall of the upward moving cavity 18 is fixedly connected with the left side of the lower end of the stop block 21, and the right side the string 20 penetrates the inner wall of the moving cavity 33 far away from one end of the gravity cavity 81 and the lower inner wall of the upward moving cavity 18 is fixedly connected with the right side of the lower end of the stop block 21.

Beneficially, the exit brake mechanism 74 includes a long rod cavity 62 located in the handspike 22 and opening towards the storage cavity 23, a long rod 63 is slidably connected in the long rod cavity 62, a groove 64 is provided on the long rod 63, a positioning cavity 68 communicating with the long rod cavity 62 is provided on an inner wall of the long rod cavity 62 far away from one end of the storage cavity 23, a positioning block 67 is slidably connected in the positioning cavity 68, one end of the positioning block 67 far away from the storage cavity 23 is fixedly connected with a positioning spring 69, the other end of the positioning spring 69 is fixedly connected with an inner wall of the positioning cavity 68 far away from the storage cavity 23, one end of the positioning block 67 far away from the storage cavity 23 is fixedly connected with a pull wire 71, the other end of the pull wire 71 is fixedly connected with a pull ring 70, a connecting spring 65 is fixedly connected to the left end of the long rod 63 behind, and the left end of the connecting, the front end of the long rod 63 is fixedly connected with a pressure spring 66, the right end of the pressure spring 66 is fixedly connected with the right inner wall of the long rod cavity 62, the lower inner wall of the outlet 24 is provided with a compression cavity 30 with an upward opening, the compression cavity 30 is internally and slidably connected with a baffle plate 25, the lower end of the baffle plate 25 is fixedly connected with a compression spring 31, the lower end of the compression spring 31 is fixedly connected with the lower inner wall of the compression cavity 30, the lower end of the baffle plate 25 is fixedly connected with a long rope 32, the long rope 32 penetrates through the lower inner wall and the rear part of the compression cavity 30, the right inner wall of the long rod cavity 62 is fixedly connected with the right end of the long rod 63, the front inner wall and the rear wall of the gravity cavity 81 are respectively provided with a fast clamping cavity 59 with an opening facing to the wheel 55, the fast clamping cavity 59 is internally and slidably connected with a clamping block 58, one end of the clamping block 58 is far away, a thin wire 61 is fixedly connected to one end of the clamping block 58 close to the gravity cavity 81, and the thin wire 61 penetrates through the inner wall of the clamping fast cavity 59 and the left inner wall of the front long rod cavity 62 to be fixedly connected with the left end of the long rod 63.

Advantageously, the elastic force of the compression spring 66 is greater than that of the extension spring 60, the elastic force of the extension spring 19 is less than that of the moving spring 34, and the elastic force of the limit spring 50 is greater than that of the return spring 41.

In the initial state, the extension spring 60 and the extension spring 19 are compressed, and the return spring 41 is extended.

The using method comprises the following steps: when the cart transports the materials to be transported to the destination, firstly, the front long rod 63 is pulled until the front positioning block 67 is positioned in the front groove 64, the position of the front long rod 63 is fixed, at the moment, the pressure spring 66 is stretched and the thin wire 61 is loosened, at the moment, the fixture block 58 moves towards the direction of the wheel 55 under the action of the extension spring 60, the fixture block 58 enters the clamping groove 57, the cart cannot move, after the cart is not moved, the rear long rod 63 is pulled until the rear positioning block 67 is positioned in the rear groove 64, the position of the rear long rod 63 is fixed, at the moment, the long wire 32 is tensioned and the connecting spring 65 is in a compressed state, the baffle plate 25 is pulled to move downwards, so that the storage cavity 23 is communicated with the outside, at the moment, the compression spring 31 is compressed, at the moment, the motor 43 starts to work, so as to drive the power, thereby driving the left driven gear 46 to start rotating, thereby driving the left rotating shaft 44 to start rotating, thereby driving the left reel 45 to start rotating, thereby pulling the elastic rope 15, thereby pulling the telescopic rod 12 to move upwards, thereby driving the push plate 16 to move upwards, until the telescopic rod 12 is moved to push the stop block 48 to move leftwards, thereby loosening the long wire 39, at this time, the stop spring 50 and the telescopic spring 14 are compressed, when the long wire 39 is loosened, the switching rod 40 moves rightwards under the action of the return spring 41, thereby driving the driving gear 79 to move rightwards, at this time, the driving gear 79 is engaged with the right driven gear 46, thereby driving the right driven gear 46 to start rotating, thereby driving the right rotating shaft 44 to start rotating, thereby driving the right reel 45 to start rotating, thereby pulling the pull rope 26, thereby driving the push plate 16 and the driving block 53 to move rightwards, the material in the storage cavity 23 is pushed to move rightwards by the movement of the push plate 16 and is gradually output to a destination from the outlet 24, when the push plate 16 moves downwards to push the trapezoidal block 27, the gas in the trapezoidal cavity 28 is compressed to the push cavity 52, the push rod 51 is pushed to move downwards, so that the telescopic rod 12 is pushed to move downwards, the limiting block 48 is reset under the action of the limiting spring 50, the long wire 39 is pulled, the switching rod 40 is pulled to move leftwards, the driving gear 79 is meshed with the left driven gear 46, the telescopic rod 12 retracts at the moment, so that the push plate 16 is driven to move leftwards, the motor 43 starts to rotate reversely at the moment, so that the elastic rope 15 is loosened, the telescopic rod 12 and the push plate 16 reset under the action of the telescopic spring 14 at the moment, and the unloading; after unloading, pulling the rear pull ring 70 to pull the rear pull wire 71 so as to pull the rear positioning block 67 to move backwards, then the rear long rod 63 resets under the action of the connecting spring 65, at the moment, the long rope 32 is loosened, at the moment, the baffle 25 moves upwards under the action of the compression spring 31 to reset, then the front pull ring 70 is pulled so as to pull the pull wire 71 so as to pull the positioning block 67 to move forwards, at the moment, the positioning spring 69 is compressed, at the moment, the front long rod 63 moves rightwards under the action of the pressure spring 66 so as to pull the thin wire 61, so that the fixture block 58 moves towards the direction far away from the wheel 55 so as to separate the fixture block 58 from the fixture groove 57, and at the moment, the trolley; when the material is pushed to run up and down, the round block 36 moves leftwards under the action of gravity, so that the left moving block 35 is pushed to move leftwards, the left string 20 is loosened, the left moving spring 34 is compressed, the left stop block 21 moves upwards under the action of the left tension spring 19, and the material in the storage cavity 23 is prevented from falling; when encountering a downhill, the round block 36 moves rightwards under the action of gravity, so that the right moving block 35 is pushed to move rightwards, the right string 20 is loosened, the right moving spring 34 is compressed at the moment, the right stop block 21 moves upwards under the action of the right stretching spring 19 at the moment, the material in the storage cavity 23 is prevented from falling off, when the ground returns to the flat ground, the round block 36 returns to the central position, the moving block 35 resets under the action of the moving spring 34 at the moment, the string 20 is pulled, and the stop block 21 is pulled to move downwards to reset.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an automatic engineering shallow of unloading, includes the dolly, its characterized in that: the front end and the rear end of the trolley are both rotationally connected with an axle, wheels are fixedly connected to the axle, clamping grooves with openings facing the trolley are arranged on the wheels, two push rods which are symmetrical front and back are fixedly connected to the left end of the trolley, a storage cavity with an upward opening is arranged in the trolley and used for storing transported materials, an outlet communicated with the outside and the storage cavity is arranged in the right inner wall of the storage cavity, a discharging mechanism for discharging materials is arranged in the trolley and comprises a sliding cavity which is positioned in the lower inner wall of the storage cavity and communicated with the storage cavity, a trapezoidal cavity with an upward opening is arranged in the lower inner wall of the sliding cavity, a trapezoidal block is connected in the trapezoidal cavity in a sliding mode, a lifting spring is fixedly connected at the lower end of the trapezoidal block, the lower end of the lifting spring is fixedly connected with the lower inner wall of the trapezoidal cavity, and a reset, the reset cavity is internally and slidably connected with a push plate, the push plate is provided with a push groove with a rightward opening, the push groove is slidably connected with a driving block, a telescopic cavity with a rightward opening is arranged in the left inner wall of the reset cavity, a telescopic rod with a right end fixedly connected with the push plate is slidably connected in the telescopic cavity, the upper end of the telescopic rod is fixedly connected with a telescopic spring, the telescopic spring is fixedly connected with the upper inner wall of the telescopic cavity, a limit cavity with a rightward opening is arranged in the left inner wall of the telescopic cavity, a limit block is slidably connected in the limit cavity, the left end of the limit block is fixedly connected with a limit spring, the limit spring is fixedly connected with the left inner wall of the limit block, a push cavity with a downward opening is arranged in the upper inner wall of the telescopic cavity, a push rod is slidably connected in the push cavity, the upper end, the inner wall fixedly connected with intercommunication on the promotion chamber promote the chamber and the pneumatic tube in trapezoidal chamber, it is equipped with the switching mechanism that is used for the transmission to switch to reset to be equipped with in the chamber right side inner wall, the switching mechanism below is equipped with the leak protection mechanism that is used for preventing to empty, is equipped with the export brake mechanism that is used for controlling export and brake in the handspike.

2. The automatic unloading engineering cart of claim 1, wherein: the switching mechanism comprises a power cavity positioned in the right inner wall of the reset cavity, a motor is fixedly connected to the left inner wall of the power cavity, the motor is in power connection with a power shaft, a driving gear is in key connection with the power shaft, a ring-shaped groove is formed in the driving gear, rotating shafts are rotatably connected to the left inner wall and the right inner wall of the power cavity, a wire wheel and a driven gear are fixedly connected to the rotating shafts, an elastic rope is wound on the wire wheel on the left side, penetrates through the upper inner wall of the power cavity and the upper inner wall of the telescopic cavity and is fixedly connected with the upper end of a telescopic rod, a pull rope is wound on the wire wheel on the right side, penetrates through the upper inner wall of the power cavity and the rear inner wall of the sliding cavity and is fixedly connected with the right end of the driving block, the driven gear, the switching cavity is internally and slidably connected with a switching rod, the upper end of the switching rod is located in the annular groove, the right end of the switching rod is fixedly connected with a reset spring, the right end of the reset spring is fixedly connected with the right inner wall of the switching cavity, the left end of the switching rod is fixedly connected with a long line, and the long line penetrates through the left inner wall of the switching cavity and the left inner wall of the limiting cavity and the left end of the limiting block is fixedly connected with the limiting block.

3. The automatic unloading engineering cart of claim 1, wherein: the leakage-proof mechanism comprises an upper moving cavity which is positioned in the inner wall of the storage cavity and has an upward opening, two bilaterally symmetrical check blocks are connected in the upper moving cavity in a sliding manner, the lower ends of the check blocks are fixedly connected with an extension spring, the lower ends of the extension spring are fixedly connected with the lower inner wall of the upper moving cavity, a gravity cavity is arranged in the lower inner wall of the power cavity, a round block is connected in the gravity cavity in a sliding manner, moving cavities with openings facing the gravity cavity are arranged in the left inner wall and the right inner wall of the gravity cavity, a moving block is connected in the moving cavity in a sliding manner, one end of the moving block, far away from the round block, is fixedly connected with a moving spring, the other end of the moving spring is fixedly connected with the inner wall of the moving cavity, far away from the gravity cavity, one end of the moving block is fixedly connected with a thin rope, the thin rope on the, the string on the right side penetrates through the inner wall of one end, far away from the gravity cavity, of the moving cavity and the lower inner wall of the upper moving cavity and is fixedly connected with the lower end of the stop block on the right side.

4. The automatic unloading engineering cart of claim 1, wherein: the outlet brake mechanism comprises a long rod cavity which is positioned in the hand push rod and has an opening facing the storage cavity, a long rod is connected in the long rod cavity in a sliding manner, a groove is arranged on the long rod, a positioning cavity communicated with the long rod cavity is arranged on the inner wall of one end of the long rod cavity far away from the storage cavity, a positioning block is connected in the positioning cavity in a sliding manner, one end of the positioning block far away from the storage cavity is fixedly connected with a positioning spring, the other end of the positioning spring is fixedly connected with the inner wall of the positioning cavity far away from the storage cavity, one end of the positioning block far away from the storage cavity is fixedly connected with a pull wire, the other end of the pull wire is fixedly connected with a pull ring, the rear end of the long rod is fixedly connected with a connecting spring, the left end of the connecting spring is fixedly connected with the left inner wall of the, a compression cavity with an upward opening is arranged in the lower inner wall of the outlet, a baffle is connected in the compression cavity in a sliding way, the lower end of the baffle is fixedly connected with a compression spring, the lower end of the compression spring is fixedly connected with the lower inner wall of the compression cavity, the lower end of the baffle is fixedly connected with a long rope which penetrates through the lower inner wall of the compression cavity and the right inner wall of the long rod cavity behind and is fixedly connected with the right end of the long rod, the front inner wall and the rear inner wall of the gravity cavity are both provided with a fast clamping cavity with an opening facing the wheel, a clamping block is connected in the fast clamping cavity in a sliding way, one end of the clamping block, which is far away from the wheel, is fixedly connected with an extension spring, the other end of the extension spring is fixedly connected with the inner wall of the clamping fast cavity, which is close to the gravity cavity, the fixture block is close to one end of the gravity cavity and is fixedly connected with a fine wire, and the fine wire penetrates through the inner wall of the fast clamping cavity and the front left inner wall of the long rod cavity and is fixedly connected with the left end of the long rod.

5. The automatic unloading engineering cart of claim 1, wherein: the elastic force of the pressure spring is greater than that of the extension spring, the elastic force of the extension spring is less than that of the movable spring, and the elastic force of the limit spring is greater than that of the reset spring.